Evaluation of Arctium lappa organic extracts: green synthesis of silver nanoparticles and antioxidant activity

This study investigates the phytochemical composition and antioxidant potential of Arctium lappa organic extracts, as well as their application in the green synthesis of silver nanoparticles (AgNPs). Arctium lappa leaves and flowers were extracted using various solvents, with methanol yielding the highest phenolic content, confirmed through FTIR and UV-vis analysis. The flower extracts demonstrated significant antioxidant activity, as shown by their higher inhibition in the DPPH assay compared to the methanolic leaf extract. Additionally, the extracts were used in the green synthesis of AgNPs, with solvent selection influencing the size and characteristics of the nanoparticles. This study highlights the potential of Arctium lappa as a source of bioactive compounds for both antioxidant applications and sustainable nanomaterial production. Furthermore, the combined application of UV-vis, dynamic light scattering (DLS) analysis and the analytical model highlights the significant influence of both solvent selection on the resultant size of the synthesized AgNPs.